That red ribbon on the north lawn of the white house marks today's 25th anniversary of world aids day. In those 25 years, billions have been spent on the fight against aids with so much help from u2's bono. And an army of act visits. Just this week, the star helped $26 million in an auction for the red campaign at sotheby's. That's where we sat down for our "sunday spotlight." Where we talked about a world without aids. World aids day 2013. And the end truly is in sight. Yes, it is. There's jeopardy. There really is. It does seem to be the political will of the american people have said that this fight against hiv, this tiny little virus that's wreaked so much havoc in so many people's lives, 4 -- 34 million dead. They want to seet done. In a rare display of bipartisanship, republicans and democrats came together last month to fund an american program started by president bush. We argued with president bush about setting it up. We thought, why not stick with the global fund. He said, no, we want to do it yourself. We sort of disagreed with him on that. But they actually worked well together. Republicans, historically, supported it. And democrats, the global fund. That has changed. We found ourselves as democrats going in, what about support for the global fund? But it's doing so well. Wow, this is incredible. This is what happens when people put their ego and political points away for a bigger purpose and they stop playing politics. The closer you get to the finish line the more difficult it can be. We're very worried about complacency. There's a chance of having the first aids-free generation by 2015. We can see it. We can lose that if we lose the political will. So, a new battle has begun to keep up the stunning progress in a fight at one point seemed lost. These cost a fortune, 10 grand a year. 40 cents a day for one pill. We forget how dramatic it was here in the united states and in europe. And then, when you go to africa, you go to india, there was a concern, not too long ago, that an entire generation would be wiped out. Remember being in malawi, where there was four to a bed, queuing up, to be diagnosed but the diagnosis was a death sentence because there was no treatment. They had the medications but they couldn't give it to them. They couldn't afford it. And it actually really, was sort of an assault on my whole idea of equality. I thought an accident of where you live cannot decide whether you live. I'm ready to put my life on the line for that. We can't be denying them to others. It's amazing. It's happened now. I think about it. I'm so excited. Progress is so stunning. Our thanks to bono. Some welcome news from afghanistan this week as well, pentagon did not announce any death of service members overseas. Check out "world news" with that's all for us. Thank you for sharing part of your thanksgiving weekend with us. Check out "world news" with

This transcript has been automatically generated and may not be 100% accurate.

World AIDS Day: History of the Epidemic

A short history of the HIV and AIDS epidemic.

U2's Bono Putting on Auction to Fight AIDS

The singer teamed up with top designers Sir Jonathan Ive and Marc Newson for the charity event.

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